package com.ruoyi.common.utils;

/**
 * 金额数字转换成大写
 *
 * @Author qiqi
 * @Date 2022/6/15 18:32
 * @Version 1.0
 */
public class ConvertNumberToUpperUtil {
    /**
     * 数字金额大写转换，思想先写个完整的然后将如零拾替换成零 要用到正则表达式
     */
    public static String digitUppercase(double n) {
        String[] fraction = {"角", "分"};
        String[] digit = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
        String[][] unit = {{"元", "万", "亿"}, {"", "拾", "佰", "仟"}};

        String head = n < 0 ? "负" : "";
        n = Math.abs(n);

        String s = "";
        for (int i = 0; i < fraction.length; i++) {
            s += (digit[(int) (Math.floor(n * 10 * Math.pow(10, i)) % 10)] + fraction[i]).replaceAll("(零.)+", "");
        }
        if (s.length() < 1) {
            s = "整";
        }
        int integerPart = (int) Math.floor(n);

        for (int i = 0; i < unit[0].length && integerPart > 0; i++) {
            String p = "";
            for (int j = 0; j < unit[1].length && n > 0; j++) {
                p = digit[integerPart % 10] + unit[1][j] + p;
                integerPart = integerPart / 10;
            }
            s = p.replaceAll("(零.)*零$", "").replaceAll("^$", "零") + unit[0][i] + s;
        }
        String a = head + s.replaceAll("(零.)*零元", "元").replaceAll("(零.)+", "零").replaceAll("^整$", "零元整");
        if(a.charAt(0)=='零'){
          return   a.substring(1,a.length());
        }
        return a;
    }


}
